These comfortable slip-ons are versatile for any winter activity in temperatures down to -25F. With 200 grams of PrimaLoft® Eco insulation, shell casing, and TNF Winter Grip™ rubber outsole, these boots will maintain high-grip capabilities in sub-zero conditions. Made of waterproof nubuck leather with AgION™ antimicrobial silver agent woven into the top sheet of footbeds to control odors.